Nb - iot recently, under the slogan is very big, who can answer
NB - IoT is IoT (Internet of things) one of these standards, the characteristics of NB - IoT is: eat less and sleep more, to work, don't pay attention to,
A, NB - IoT profile
Based on cellular narrowband Internet of Things (Narrow Band Internet of Things, NB - IoT) became an important branch of the Internet, all NB - IoT building in cellular networks, is only about 180 KHZ bandwidth consumption, can be directly deployed in GSM network, UMTS network, or LTE, to reduce the deployment cost, achieve a smooth upgrade,
NB - IOT comprehensive focus on low power consumption (LPWA) Internet of things (IOT) market, is a kind of widely used in the global scope emerging
Technology, with wide coverage, connection, low rate, low cost, low power consumption, excellent architecture, NB - IOT use License frequencies,
Take belt, protective belt or independent carrier of three methods for deployment, such as with the existing network coexistence,
Second, NB - IoT has the following features:
1. A broad
NB - IoT technology can achieve better than GSM covered more than 20 db gain, cover area expanded to 100 times, in the underground garage, underground pipes can be covered,
2. The big connection
NB - IoT single sector support 50000 connections, higher than now to 50 times (2 g/3 g/4 g were 14/128/1200), the world has about 5 million physical sites, assuming full deployment of NB - IoT, each site can access the Internet of things terminal number three sectors will amount to 450 billion; Narrowband technology: 36 channel uplink equivalent power * 23 DBM, increase channel capacity reducing lip; Signaling overhead and improve spectrum efficiency base station optimization: independent access congestion control and terminal context information is stored; Core network optimization: terminal context storage and downstream data cache,
3. Low power consumption
NB - IoT terminals, such as sending a 200 byte message every day, AA battery standby time 10 years, a single fast pass time shortened, terminal 99% of the time working in the energy saving mode (PSM), the energy saving mode and mobile energy saving mode, the terminal still registered in the network, but signaling inaccessible, terminal in a deep sleep, terminal power consumption only 15 amounts, 99% of the time it's sleep time is long, can reduce the frequency of terminal to monitor network
4. Low cost
At present a single module to the cost of not more than five dollars, goal is to do about $1, 180 KHZ narrowband, decrease the complexity chip; To simplify the protocol stack (500 byte), reduce the on-chip Flash/RAM; Single antenna for a low sampling rate, half duplex, radio frequency (rf) of low cost,
At present chengdu has called the mountains technology research and development of serial port server companies made a telecommunications network access license, CoPA agreement, as some of well-known jinan and Shanghai ZhuoNaHai research and development company that has not obtained a CoPA protocol, and examined,
Hope to adopt
CodePudding user response:
NB is the NB operators, LoRa could be your LoRa